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Novel efficient hydrofoil

A hydrofoil and high-efficiency technology, applied to ships, hydrodynamic characteristics/hydrostatic characteristics, hulls, etc., can solve problems such as unstable lift, increased noise, increased resistance, etc., to increase the pressure of the flow field, reduce the Small resistance, the effect of reducing viscous resistance

Active Publication Date: 2014-07-09
ZHEJIANG OCEAN UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Cavitation is a very harmful phenomenon. It will cause early mechanical damage, increased noise, etc., and it will cause increased resistance and unstable lift, and even cause disasters.

Method used

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  • Novel efficient hydrofoil
  • Novel efficient hydrofoil

Examples

Experimental program
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Embodiment Construction

[0024] The present invention will be further described below based on specific embodiments and drawings.

[0025] Such as figure 1 with figure 2 The low drag hydrofoil shown includes a hydrofoil pillar 1 and a hydrofoil plate 2. The cross-sectional shape of the hydrofoil plate 2 is an airfoil. The hydrofoil has a wingspan of 15m and a chord length of 3m. On the surface of 2, circular pits 3 are aligned vertically and horizontally. The depth of the pits 3 is 30 mm, and the area ratio of the pits 3 on the surface of the hydrofoil plate 2 is 50%.

[0026] Due to traditional habits, people think that the smoother the surface, the lower the frictional resistance, and the better materials such as titanium alloy materials will have better anti-cavitation effects. Therefore, the traditional research and development directions are mostly focused on improving the shape of the hydrofoil to reduce For the resistance it receives, better materials are used to combat the cavitation effect, but ...

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Abstract

The invention provides a novel efficient hydrofoil. The novel efficient hydrofoil comprises hydrofins and a hydrofoil strut. The hydrofins are fixedly mounted below a naval ship through the hydrofoil strut, and the outer surfaces of the hydrofins are provided with antidrag structures composed of rough belts, grooves, pits or texture structures. The hydrofins with the antidrag structures have high lift-drag ratio when moving in the water, frictional drag and viscous drag of the hydrofoil to the water can be reduced, energy efficiency of driving delivery tools such as foilcrafts can be improved, and the novel efficient hydrofoil has the advantages that ship navigation speed is improved and energy conservation and emission reduction are realized.

Description

Technical field [0001] The invention relates to a hydrofoil device, and more specifically, to a new type of high-efficiency hydrofoil. Background technique [0002] A hydrofoil or hydrofoil is an underwater vehicle that can sail at high speeds. The bottom of the hull is equipped with a support, and a hydrofoil is installed under the support, and the hydrofoil is completely or partially submerged in the water. According to the principle of fluid mechanics, the higher the flow rate, the lower the pressure. When the ship is sailing in the water, the water flows quickly relative to the hydrofoil, and the water flow speed through the upper surface is high, and the water flow speed on the lower surface is low, so that the upper and lower surfaces of the hydrofoil form a pressure difference, when the pressure difference is strong At a certain level, the hull will be raised, or even above the water. The volume of the hull immersed in the water is reduced, and the resistance to the wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B1/24
Inventor 王化明李超屠璐琼杨秀勇陈俊宏
Owner ZHEJIANG OCEAN UNIV
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